3.5 stars really. The first floor was wonderful and engaging after that my wife and felt a big Meh. All other levels were really nothing at all, the top two floors were closed as they prepared for a new exhibit so I would double check before coming to see if this might be the case for you. Overall this was my third visit to the Hall since it opened, I do not think we will be coming back any time soon unless there is an exhibit we really want to see.